He showed up again on Muppets Tonight in 1996, as Dr. Phil van Neuter's assistant in the "Tales from the Vet" sketches. In Muppets Tonight, Mulch lost the ability to speak English; he communicated in a guttural, grunting language that only Dr. van Neuter understood (although in the bloopers after each episode he is often heard yelling words such as "I'm sorry!"). His role in these sketches often resulted in van Neuter being humiliated in some way.

One installment revealed that Dr. van Neuter is married to Mulch's sister, Composta Heap.